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+# ksba.m4 - autoconf macro to detect ksba
+# Copyright (C) 2002, 2018 g10 Code GmbH
+#
+# This file is free software; as a special exception the author gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#
+# Last-changed: 2020-11-18
+
+dnl AM_PATH_KSBA([MINIMUM-VERSION,
+dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
+dnl Test for libksba and define KSBA_CFLAGS and KSBA_LIBS
+dnl MINIMUN-VERSION is a string with the version number optionalliy prefixed
+dnl with the API version to also check the API compatibility. Example:
+dnl a MINIMUN-VERSION of 1:1.0.7 won't pass the test unless the installed
+dnl version of libksba is at least 1.0.7 *and* the API number is 1. Using
+dnl this features allows to prevent build against newer versions of libksba
+dnl with a changed API.
+dnl
+AC_DEFUN([AM_PATH_KSBA],
+[ AC_REQUIRE([AC_CANONICAL_HOST])
+ dnl --with-libksba-prefix=PFX is the preferred name for this option,
+ dnl since that is consistent with how our three siblings use the directory/
+ dnl package name in --with-$dir_name-prefix=PFX.
+ AC_ARG_WITH(libksba-prefix,
+ AS_HELP_STRING([--with-libksba-prefix=PFX],
+ [prefix where KSBA is installed (optional)]),
+ ksba_config_prefix="$withval", ksba_config_prefix="")
+
+ dnl Accept --with-ksba-prefix and make it work the same as
+ dnl --with-libksba-prefix above, for backwards compatibility,
+ dnl but do not document this old, inconsistently-named option.
+ AC_ARG_WITH(ksba-prefix,,
+ ksba_config_prefix="$withval", ksba_config_prefix="")
+
+ if test x$ksba_config_prefix != x ; then
+ if test x${KSBA_CONFIG+set} != xset ; then
+ KSBA_CONFIG=$ksba_config_prefix/bin/ksba-config
+ fi
+ fi
+
+ use_gpgrt_config=""
+ if test x"$KSBA_CONFIG" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+ if $GPGRT_CONFIG ksba --exists; then
+ KSBA_CONFIG="$GPGRT_CONFIG ksba"
+ AC_MSG_NOTICE([Use gpgrt-config as ksba-config])
+ use_gpgrt_config=yes
+ fi
+ fi
+ if test -z "$use_gpgrt_config"; then
+ AC_PATH_PROG(KSBA_CONFIG, ksba-config, no)
+ fi
+
+ tmp=ifelse([$1], ,1:1.0.0,$1)
+ if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
+ req_ksba_api=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\1/'`
+ min_ksba_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
+ else
+ req_ksba_api=0
+ min_ksba_version="$tmp"
+ fi
+
+ AC_MSG_CHECKING(for KSBA - version >= $min_ksba_version)
+ ok=no
+ if test "$KSBA_CONFIG" != "no" ; then
+ req_major=`echo $min_ksba_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+ req_minor=`echo $min_ksba_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+ req_micro=`echo $min_ksba_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
+ if test -z "$use_gpgrt_config"; then
+ ksba_config_version=`$KSBA_CONFIG --version`
+ else
+ ksba_config_version=`$KSBA_CONFIG --modversion`
+ fi
+ major=`echo $ksba_config_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
+ minor=`echo $ksba_config_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
+ micro=`echo $ksba_config_version | \
+ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
+ if test "$major" -gt "$req_major"; then
+ ok=yes
+ else
+ if test "$major" -eq "$req_major"; then
+ if test "$minor" -gt "$req_minor"; then
+ ok=yes
+ else
+ if test "$minor" -eq "$req_minor"; then
+ if test "$micro" -ge "$req_micro"; then
+ ok=yes
+ fi
+ fi
+ fi
+ fi
+ fi
+ fi
+ if test $ok = yes; then
+ AC_MSG_RESULT([yes ($ksba_config_version)])
+ else
+ AC_MSG_RESULT(no)
+ fi
+ if test $ok = yes; then
+ # Even if we have a recent libksba, we should check that the
+ # API is compatible.
+ if test "$req_ksba_api" -gt 0 ; then
+ if test -z "$use_gpgrt_config"; then
+ tmp=`$KSBA_CONFIG --api-version 2>/dev/null || echo 0`
+ else
+ tmp=`$KSBA_CONFIG --variable=api_version 2>/dev/null || echo 0`
+ fi
+ if test "$tmp" -gt 0 ; then
+ AC_MSG_CHECKING([KSBA API version])
+ if test "$req_ksba_api" -eq "$tmp" ; then
+ AC_MSG_RESULT(okay)
+ else
+ ok=no
+ AC_MSG_RESULT([does not match. want=$req_ksba_api got=$tmp.])
+ fi
+ fi
+ fi
+ fi
+ if test $ok = yes; then
+ KSBA_CFLAGS=`$KSBA_CONFIG --cflags`
+ KSBA_LIBS=`$KSBA_CONFIG --libs`
+ ifelse([$2], , :, [$2])
+ if test -z "$use_gpgrt_config"; then
+ libksba_config_host=`$KSBA_CONFIG --host 2>/dev/null || echo none`
+ else
+ libksba_config_host=`$KSBA_CONFIG --variable=host 2>/dev/null || echo none`
+ fi
+ if test x"$libksba_config_host" != xnone ; then
+ if test x"$libksba_config_host" != x"$host" ; then
+ AC_MSG_WARN([[
+***
+*** The config script "$KSBA_CONFIG" was
+*** built for $libksba_config_host and thus may not match the
+*** used host $host.
+*** You may want to use the configure option --with-libksba-prefix
+*** to specify a matching config script.
+***]])
+ fi
+ fi
+ else
+ KSBA_CFLAGS=""
+ KSBA_LIBS=""
+ ifelse([$3], , :, [$3])
+ fi
+ AC_SUBST(KSBA_CFLAGS)
+ AC_SUBST(KSBA_LIBS)
+])